Answer:
E. cytosine and uracil
Explanation:
Pyrimidine is an aromatic compound similar to pyridine. The difference is that it has two nitrogen atoms at positions 1 and 3 in the ring.
The pyrimidine bases have the same six-membered ring structure with two N atoms at the 1,3-positions.
In addition, cytosine has a carbonyl and an amino group, while uracil has two carbonyl groups.
